G. Rasch on probability and prediction

Where it is a question of human beings and their actions, it appears quite hopeless to construct models which can be useful for purposes of prediction in separate cases. On the contrary, what a human being actually does seems quite haphazard, none less than radioactive emission. (p. 11)

Rasch, G. (1960). Probabilistic models for some intelligence and attainment tests. Copenhagen: Danmarks Paedagogike Institut.

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